• Royal Mail v DAF Trucks 4 March 2020 [2020] CAT 7 (on binding nature of infringements decisions)
• CMA v Flynn & Pfizer 10 March 2020 [2020] EWCA Civ 339 (on test for unfair pricing)
• CMA v Flynn & Pfizer 12 May 2020 [2020] EWCA Civ 617 (CMA’s immunity from costs)
• Sainsbury’s Supermarkets v Visa & Mastercard 17 June 2020 [2020] UKSC 24 (on interchange fees)

Leading silk in Competition: “Mark is a leader in his field and offers a level of strategic insight into cases that is unmatched.” – Legal 500, 2023

Recommended in Competition, Who’s Who Legal UK Bar 2022

Competition: “He is in most of the high-profile cases; he has huge experience. One of his strengths is that he can separate the good points from the bad and zoom in on the good ones.” “He is first class – good at persuading the judges.” – Chambers UK and Chambers Global, 2022

Leading silk in Competition: “Mark has an encyclopedic knowledge of competition litigation (he literally wrote the book) and this knowledge, combined with a commercial and tactical approach and user-friendly style makes him one of the top silks in this area.” – Legal 500, 2022

Recommended in Competition, Who’s Who Legal 2022

Competition: “He has fantastic judgement and really gets to the nub of his cases.” “He has the ability to translate very complicated and difficult areas of law into language that lay people can instantly understand.” – Chambers UK and Chambers Global, 2021

Leading silk in Competition: ‘‘A highly respected and well liked competition specialist.’’ – Legal 500, 2021

“Standout advocate who ranks highly for his impressive work representing clients before regulatory authorities and competition tribunals.” – Competition, Who’s Who Legal UK Bar 2020

Competition: “He has an understated advocacy style” and a “really good nose for how a case should be run.” “In court you can tell that all of the senior competition judges trust his views.” “He breaks down complicated issues for the judge to understand” and “you see all levels of the judiciary paying a lot of attention to him.” – Chambers UK and Chambers Global, 2020 

Leading silk in Competition: ‘‘Highly respected.’’ – Legal 500, 2020

“Ranks highly this year for his extensive experience appearing before English and Welsh courts, as well as the Competition Appeal Tribunal and the Court of Justice of the European Union” – Competition, Who’s Who Legal UK Bar 2019

Competition: “He has a very powerful instinct for the points that will appeal to a court and an attractive way of presenting arguments in court.” – Chambers UK and Chambers Global, 2019

Leading silk in Aviation: ‘‘Very knowledgeable, is a pleasure to work with and well-liked by clients’’ – Legal 500, 2018

Leading silk in Competition: ‘‘A pleasure to work with and well-liked by clients, he has an impressive ability to tailor his advice to his audience, often delivering complex advice with admirable brevity.’’ – Legal 500, 2018

Competition: “He has a finely tuned sense of what will play well and an excellent sense of how best to present points.” – Chambers UK, 2018

Leading silk in Aviation: ‘‘First-rate.’’ – Legal 500, 2017

Leading silk in Competition: ‘‘He marries expert knowledge with on-point analytical skills.’’ – Legal 500, 2017

“Displays all-round excellence in court and in conference.” – Chambers & Partners, 2017

“Excellent on his feet, clear-thinking and user-friendly.” – Chambers & Partners Global, 2016

“A first-rate individual.”  – Legal 500, 2016

“Tremendous; one of the top subject matter experts.” – Legal 500, 2016

“He “brings to the conduct of any case an intellectual originality that combines market-leading legal expertise with flair,”” – Chambers & Partners, 2013

“easy to work with and enormously impressive” – Legal 500, 2012

“Another standout silk at the set is Mark Brealey QC. He attracts strong praise from sources for his “pragmatic and commercial” approach and for the fact that he is “collegiate in his approach and a very good team player.”” – Chambers & Partners, 2012

“Mark Brealey QC ‘leads in competition law damages claims’ and ‘demonstrates an intelligent and balanced approach that attracts both judges and clients’” – Legal 500, 2011

“Mark Brealey QC impresses as one of the most popular barristers for both competition and EU law. “His reputation as a superbly clear and concise advocate is richly deserved,” sources say.” – Chambers & Partners, 2011

“A leading figure in follow-on damages cases, Mark Brealey QC has had ‘a number of recent successes’” – Legal 500, 2010

“Mark Brealey QC is “a subtle advocate who commands the respect of the court.”” – Chambers & Partners, 2010

“The ‘formidably intellectual, imaginative and compelling” advocate Mark Brealey QC’” – Chambers & Partners, 2010

“Mark Brealey QC offers ‘lateral thinking’”  – Legal 500, 2009